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pickupchik [31]
3 years ago
15

3x + y = 6 5x - 2y = 10

Mathematics
1 answer:
Eddi Din [679]3 years ago
3 0

Answer:

x=2

y = 0

Step-by-step explanation:

3x + y = 6         -------------(i)

5x - 2y = 10      -------------(ii)

Multiply (i) by 2   ===>   6x +2y = 12

                     (ii)  ===>   <u> 5x - 2y =  10</u>

add   ============>    11x       = 22

                                              x = 22/11

                                              x = 2

Substitute x = 2 in (i)

       3*2 + y = 6

           6 + y = 6

                 y =  6 - 6

                 y = 0

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70 - q -q - 2q = 80 <br> plz help me i don't get it
Montano1993 [528]

Answer:

the answer is:    q = -2.5

Step-by-step explanation:

70 - q - q - 2q = 80

70 - 4q = 80

-4q = 10

q = -2.5

3 0
2 years ago
Find the first and second derivatives of the function y = sin(x^2)
exis [7]
Y = sin(x^2)

Use the chain rule.

We want dy/dx.

dy/dx = cos(x^2)*2x

dy/dx = 2xcos(x^2)

Did you follow?
7 0
2 years ago
The Massachusetts Bay Colony set up a government known as?
vladimir1956 [14]

Answer:

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3/4 divided by 5 1/5 =
anyanavicka [17]
0.1442
0.1714
0.05487
0.2075
5 0
3 years ago
The height of an object from a distance
olga55 [171]
Y = height
x = distance from tower

tan(19.9) = y/x

tan(21.8) = y/(x-50)   ( x is 50 feet closer so subtract 50 from x)

find the tan of the angles:
tan19.9 = 0.362
tan21.8 = 0.400

replace those values in the equations:
0.362 = y /x
0.400 = y / (x-50)

rewrite to solve for height:
0.362x = y
0.400(x-50) = y  distribute the 0.400 and rewrite as 0.400x-20 =y

now solve:

0.362x = 0.400x-20

add 20 to each side:
0.362x +20 = 0.400x

subtract 0.362x from each side:

20 = 0.038x

divide both sides by 0.038
x = 20 / 0.038 = 526.3 feet

now that x is known replace x in the original equation and solve for y:

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the height of the tower is 190.5 feet
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3 years ago
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